Mini Shell
import os
import errno
import importlib.machinery
import py_compile
import shutil
import unittest
import tempfile
from test import support
import modulefinder
TEST_DIR = tempfile.mkdtemp()
TEST_PATH = [TEST_DIR, os.path.dirname(tempfile.__file__)]
# Each test description is a list of 5 items:
#
# 1. a module name that will be imported by modulefinder
# 2. a list of module names that modulefinder is required to find
# 3. a list of module names that modulefinder should complain
# about because they are not found
# 4. a list of module names that modulefinder should complain
# about because they MAY be not found
# 5. a string specifying packages to create; the format is obvious imo.
#
# Each package will be created in TEST_DIR, and TEST_DIR will be
# removed after the tests again.
# Modulefinder searches in a path that contains TEST_DIR, plus
# the standard Lib directory.
maybe_test = [
"a.module",
["a", "a.module", "sys",
"b"],
["c"], ["b.something"],
"""\
a/__init__.py
a/module.py
from b import something
from c import something
b/__init__.py
from sys import *
""",
]
maybe_test_new = [
"a.module",
["a", "a.module", "sys",
"b", "__future__"],
["c"], ["b.something"],
"""\
a/__init__.py
a/module.py
from b import something
from c import something
b/__init__.py
from __future__ import absolute_import
from sys import *
"""]
package_test = [
"a.module",
["a", "a.b", "a.c", "a.module", "mymodule", "sys"],
["blahblah", "c"], [],
"""\
mymodule.py
a/__init__.py
import blahblah
from a import b
import c
a/module.py
import sys
from a import b as x
from a.c import sillyname
a/b.py
a/c.py
from a.module import x
import mymodule as sillyname
from sys import version_info
"""]
absolute_import_test = [
"a.module",
["a", "a.module",
"b", "b.x", "b.y", "b.z",
"__future__", "sys", "gc"],
["blahblah", "z"], [],
"""\
mymodule.py
a/__init__.py
a/module.py
from __future__ import absolute_import
import sys # sys
import blahblah # fails
import gc # gc
import b.x # b.x
from b import y # b.y
from b.z import * # b.z.*
a/gc.py
a/sys.py
import mymodule
a/b/__init__.py
a/b/x.py
a/b/y.py
a/b/z.py
b/__init__.py
import z
b/unused.py
b/x.py
b/y.py
b/z.py
"""]
relative_import_test = [
"a.module",
["__future__",
"a", "a.module",
"a.b", "a.b.y", "a.b.z",
"a.b.c", "a.b.c.moduleC",
"a.b.c.d", "a.b.c.e",
"a.b.x",
"gc"],
[], [],
"""\
mymodule.py
a/__init__.py
from .b import y, z # a.b.y, a.b.z
a/module.py
from __future__ import absolute_import # __future__
import gc # gc
a/gc.py
a/sys.py
a/b/__init__.py
from ..b import x # a.b.x
#from a.b.c import moduleC
from .c import moduleC # a.b.moduleC
a/b/x.py
a/b/y.py
a/b/z.py
a/b/g.py
a/b/c/__init__.py
from ..c import e # a.b.c.e
a/b/c/moduleC.py
from ..c import d # a.b.c.d
a/b/c/d.py
a/b/c/e.py
a/b/c/x.py
"""]
relative_import_test_2 = [
"a.module",
["a", "a.module",
"a.sys",
"a.b", "a.b.y", "a.b.z",
"a.b.c", "a.b.c.d",
"a.b.c.e",
"a.b.c.moduleC",
"a.b.c.f",
"a.b.x",
"a.another"],
[], [],
"""\
mymodule.py
a/__init__.py
from . import sys # a.sys
a/another.py
a/module.py
from .b import y, z # a.b.y, a.b.z
a/gc.py
a/sys.py
a/b/__init__.py
from .c import moduleC # a.b.c.moduleC
from .c import d # a.b.c.d
a/b/x.py
a/b/y.py
a/b/z.py
a/b/c/__init__.py
from . import e # a.b.c.e
a/b/c/moduleC.py
#
from . import f # a.b.c.f
from .. import x # a.b.x
from ... import another # a.another
a/b/c/d.py
a/b/c/e.py
a/b/c/f.py
"""]
relative_import_test_3 = [
"a.module",
["a", "a.module"],
["a.bar"],
[],
"""\
a/__init__.py
def foo(): pass
a/module.py
from . import foo
from . import bar
"""]
relative_import_test_4 = [
"a.module",
["a", "a.module"],
[],
[],
"""\
a/__init__.py
def foo(): pass
a/module.py
from . import *
"""]
bytecode_test = [
"a",
["a"],
[],
[],
""
]
syntax_error_test = [
"a.module",
["a", "a.module", "b"],
["b.module"], [],
"""\
a/__init__.py
a/module.py
import b.module
b/__init__.py
b/module.py
? # SyntaxError: invalid syntax
"""]
same_name_as_bad_test = [
"a.module",
["a", "a.module", "b", "b.c"],
["c"], [],
"""\
a/__init__.py
a/module.py
import c
from b import c
b/__init__.py
b/c.py
"""]
coding_default_utf8_test = [
"a_utf8",
["a_utf8", "b_utf8"],
[], [],
"""\
a_utf8.py
# use the default of utf8
print('Unicode test A code point 2090 \u2090 that is not valid in cp1252')
import b_utf8
b_utf8.py
# use the default of utf8
print('Unicode test B code point 2090 \u2090 that is not valid in cp1252')
"""]
coding_explicit_utf8_test = [
"a_utf8",
["a_utf8", "b_utf8"],
[], [],
"""\
a_utf8.py
# coding=utf8
print('Unicode test A code point 2090 \u2090 that is not valid in cp1252')
import b_utf8
b_utf8.py
# use the default of utf8
print('Unicode test B code point 2090 \u2090 that is not valid in cp1252')
"""]
coding_explicit_cp1252_test = [
"a_cp1252",
["a_cp1252", "b_utf8"],
[], [],
b"""\
a_cp1252.py
# coding=cp1252
# 0xe2 is not allowed in utf8
print('CP1252 test P\xe2t\xe9')
import b_utf8
""" + """\
b_utf8.py
# use the default of utf8
print('Unicode test A code point 2090 \u2090 that is not valid in cp1252')
""".encode('utf-8')]
def open_file(path):
dirname = os.path.dirname(path)
try:
os.makedirs(dirname)
except OSError as e:
if e.errno != errno.EEXIST:
raise
return open(path, 'wb')
def create_package(source):
ofi = None
try:
for line in source.splitlines():
if type(line) != bytes:
line = line.encode('utf-8')
if line.startswith(b' ') or line.startswith(b'\t'):
ofi.write(line.strip() + b'\n')
else:
if ofi:
ofi.close()
if type(line) == bytes:
line = line.decode('utf-8')
ofi = open_file(os.path.join(TEST_DIR, line.strip()))
finally:
if ofi:
ofi.close()
class ModuleFinderTest(unittest.TestCase):
def _do_test(self, info, report=False, debug=0, replace_paths=[], modulefinder_class=modulefinder.ModuleFinder):
import_this, modules, missing, maybe_missing, source = info
create_package(source)
try:
mf = modulefinder_class(path=TEST_PATH, debug=debug,
replace_paths=replace_paths)
mf.import_hook(import_this)
if report:
mf.report()
## # This wouldn't work in general when executed several times:
## opath = sys.path[:]
## sys.path = TEST_PATH
## try:
## __import__(import_this)
## except:
## import traceback; traceback.print_exc()
## sys.path = opath
## return
modules = sorted(set(modules))
found = sorted(mf.modules)
# check if we found what we expected, not more, not less
self.assertEqual(found, modules)
# check for missing and maybe missing modules
bad, maybe = mf.any_missing_maybe()
self.assertEqual(bad, missing)
self.assertEqual(maybe, maybe_missing)
finally:
shutil.rmtree(TEST_DIR)
def test_package(self):
self._do_test(package_test)
def test_maybe(self):
self._do_test(maybe_test)
def test_maybe_new(self):
self._do_test(maybe_test_new)
def test_absolute_imports(self):
self._do_test(absolute_import_test)
def test_relative_imports(self):
self._do_test(relative_import_test)
def test_relative_imports_2(self):
self._do_test(relative_import_test_2)
def test_relative_imports_3(self):
self._do_test(relative_import_test_3)
def test_relative_imports_4(self):
self._do_test(relative_import_test_4)
def test_syntax_error(self):
self._do_test(syntax_error_test)
def test_same_name_as_bad(self):
self._do_test(same_name_as_bad_test)
def test_bytecode(self):
base_path = os.path.join(TEST_DIR, 'a')
source_path = base_path + importlib.machinery.SOURCE_SUFFIXES[0]
bytecode_path = base_path + importlib.machinery.BYTECODE_SUFFIXES[0]
with open_file(source_path) as file:
file.write('testing_modulefinder = True\n'.encode('utf-8'))
py_compile.compile(source_path, cfile=bytecode_path)
os.remove(source_path)
self._do_test(bytecode_test)
def test_replace_paths(self):
old_path = os.path.join(TEST_DIR, 'a', 'module.py')
new_path = os.path.join(TEST_DIR, 'a', 'spam.py')
with support.captured_stdout() as output:
self._do_test(maybe_test, debug=2,
replace_paths=[(old_path, new_path)])
output = output.getvalue()
expected = "co_filename %r changed to %r" % (old_path, new_path)
self.assertIn(expected, output)
def test_extended_opargs(self):
extended_opargs_test = [
"a",
["a", "b"],
[], [],
"""\
a.py
%r
import b
b.py
""" % list(range(2**16))] # 2**16 constants
self._do_test(extended_opargs_test)
def test_coding_default_utf8(self):
self._do_test(coding_default_utf8_test)
def test_coding_explicit_utf8(self):
self._do_test(coding_explicit_utf8_test)
def test_coding_explicit_cp1252(self):
self._do_test(coding_explicit_cp1252_test)
def test_load_module_api(self):
class CheckLoadModuleApi(modulefinder.ModuleFinder):
def __init__(self, *args, **kwds):
super().__init__(*args, **kwds)
def load_module(self, fqname, fp, pathname, file_info):
# confirm that the fileinfo is a tuple of 3 elements
suffix, mode, type = file_info
return super().load_module(fqname, fp, pathname, file_info)
self._do_test(absolute_import_test, modulefinder_class=CheckLoadModuleApi)
if __name__ == "__main__":
unittest.main()
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